comments on the rock island 1911 tac 10mm
You might want to post this under the 10mm Semi-Auto Handguns forum:
http://10mm-firearms.com/10mm-semi-auto-handguns/
Had one, good gun, upgraded to a Kimber target II Stainless, better gun IMO. I think the Rock is about the best buy for the money in a 1911 you can get.
Also have one. Really love it for the money. Only thing you will want to do is 22# recoil,26# main spring. Good luck. Springs were under 18 bucks. Still a good deal. Accuracy is awesome. Full support bull barrel. Use chip McCormick mags. Using percision cartridge 180 JHP.
How did you determine a 26 lb mainspring. My RI has a 22 main and a 20 lb recoil. It came with a 18 recoil and an unknown main. I put the 22 main in as well as the recoil. I might need to go up more. That's why I'm asking about the mainspring. Steve
Love mine a few upgrades and mods later. My wife even likes shooting it 8)
(http://i499.photobucket.com/albums/rr359/seroberts1/AD2X_0005_zps91b9673d.jpg) (http://s499.photobucket.com/user/seroberts1/media/AD2X_0005_zps91b9673d.jpg.html)
I was told the recoil spring that came from the factory was a 16 because I was the same one they use in the 45 ACP. Talked with other people in different forums and this was the set up that works best in Rocks. It depends on what type of ammo your shooting. If you shoot FBI forty loads (Hornady, PMC, ect)you should be fine. If you shoot underwood, buffalo bore, ect. You should up spring pressures. Also was told a flat bottom fire pin stop was needed for hotter loads. Due to the fact that Rock Islands are set up on the 70 series firing system.
Oh. By the way nice rig DeltaSteve. Really like what you did. :)
I'm shooting mostly Remington 180 gr. i've currently got a 20 recoil but shells are still being thrown a good 20 ft. Might have to try the 22lb recoil. But what is the determining factor on the mainspring? Steve
1st post.
I'm shooting heavy loads only. 200, 220 grain UW.
This is my woods carry gun.
22# wolf recoil spring, stock main.
Have not changed this firing pins stop.
What am I missing ?
Ty
Quote from: 10mmGuy on March 07 2014 09:26:38 PM MST
Oh. By the way nice rig DeltaSteve. Really like what you did. :)
Shoots better than my "guarantee" Baer TRS ...... Really ;D
The reason I believe for these adjustments is for buffering at the back half of the pistol. You covered the front of the pistol by having a heavier recoil spring. The rock in 10mm was springed as a 45. We are shooting a shell with 40% more pressures than a 45 if loaded to Norma specs. These were the down fall of the delta and of course a unsupported barrel which the rock has. My fingers are worth more to me than a 8 dollar spring and a 30$ firing pin stop. I'm just going off what others with more experience than me have suggested. Hope this helps. Just joined this site and have only just purchase my 10 mm 3 months ago, so this is a learning experience for me also. Great site by the way guys. Really love it!
10mmguy, I have not had mine but a couple of months and am learning and searching for all the info I can. I've searched about the mainspring. I bought the 22 mainspring in mine now from Brownell's. Wish I'd have known and I would have got a 26. So, even with a 20 lb recoil spring ,it 's throwing brass a good 20 ft. You think a. 22 recoil would be better ? Steve
Heh Heh, when I got my Fusion Fireaerms custom built 10mm, part of the package was different pound springs to match the loads I shoot. But the one it came installed with works fine. If I got the RIA, I would have some springs to try out in it.
With the Fusion and the pkg of additional springs, did it give info on what/when to change. What to be looking for?
Ya. You would be fine with the set up you have for factory loads. Probably pushing a 180 gram about 1100-1150 fps. Underwood and some reloaders are pushing same bullet 1300-1400 fps. That's the reason for the springs and firing pin stop. For the hotter loads if don't have the springs and stop the push rod will start eating into the frame and you would start getting hammer marks on the top of your beaver tail. These are some of the things I was told.
The throwing of brass is characteristic of a 10mm I believe even with springs guys have said they were throwing brass 15 ft. Have done a lot of research on 1911forum and this one. It great to hear what other people with the same gun have to say.
I am a regular on the 1911 forum,as well. Mine came with a. 16 or 18lb. It was sloppy loose. I do have a Wolff 22 and. 24 recoil spring I can try, just not a heavier mainspring. Steve
Might add that the square bottom firing pin stop was one of the 1st things I did
Quote from: harleyhopper on March 07 2014 10:58:43 PM MST
I'm shooting mostly Remington 180 gr. i've currently got a 20 recoil but shells are still being thrown a good 20 ft. Might have to try the 22lb recoil. But what is the determining factor on the mainspring? Steve
Increasing the recoil spring even more will put more stress on the frame when the slide slams closed. Increasing the weight of the mainspring and using a flat bottom firing pin stop both work to slow the slide and absorb energy when the slide is moving rearward, which helps with the brass throwing.
The firing pin stop swap and 22# recoil spring together did less for reducing the brass throwing than a 25# mainspring. I have now done all three and the brass land a more reasonable distance away. YMMV.
My RIA is running: 18# recoil spring, 28# mainspring, and Wilson flat bottom FPS. ALL my 10mm will launch the cases into low earth orbit with Norma spec ammo. I load my 180gr for around 1225fps. Easier on my guns and still stout enough for SD practice once a week.